package com.future.springcloud.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Date;

/**
 * 自定义日志过滤器
 */
@Slf4j
@Component
public class LogGatewayFilter implements GlobalFilter,Ordered{


    /*
     *  要求必须要带 uname
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("**********************************come in logGatewayFilter:" + new Date());
        String uname = exchange.getRequest().getQueryParams().getFirst("uname");
        if(uname == null){
            log.info("********************用户名为null,非法用户,o([--])o");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }

        return chain.filter(exchange);
    }

    /**
     * 过滤器优先级  0表示最高
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}
